Jig bushing



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JIG BUSHING Filedy May 28 1945 Ag Z NVENTOR.

Patented Bec. 17, 1946 JIG BUSHING James E. Antonidis, Chicago, Ill., assignor to Master Machine & Tool Company, Chicago, Ill., a corporation of Illinois Application May 28, 1945, Serial No. 596,279

Claims. 1

This invention relates in general to a new bushing for drills, reamers, and the like, although it may have a more general use wherever applicable.

An important object of the invention is toprovide a removable handle for attachment close to one end of a bushing by means of which the bushing may be inserted and removed from operative position.

A further object of the invention is to provide an improved handle of relatively light material having a strengthened offset for displacing the hand hold portion from the plane of the work so that it may be easily engaged.

A further object of the invention is to provide a light-weight handle which is easily locked in place against relative rotation with respect to the bushing.

Still a further object is to provide a bushing of this kind with a notched edge for attaching it in a fixed work position and for easily disengaging it therefrom when desired.

Still a further object of the invention is to provide a bushing having a locking spring with an easily engageable extremity for removing it, and the spring being so proportioned that it tends to seat the handle tightly against the bushing.

Other objects of the invention will appear in the specification and will be apparent from the accompanying drawing in which,

Fig. 1 is a top plan view of a jig bushing accordance with this invention;

Fig. 2 is a sectional view showing the bushing and its connection with the handle;

Fig. 3 is a fragmentary detail in section, showing the bushing neck, handle end, and locking ring therefor; and

Fig. 4 is an end View showing the bushing in elevation as applied to a support.

In operatively placing and removing a bushing of this kind, it is desirable to have a handle removably attached near the upper end and engaged with the bushing to prevent relative rotation. The handle should be light and strong and it should extend outwardly away from the Work so that the bushing may be easily applied or removed, and provision should also be made for engaging the bushing or the handle to hold the bushing rmly in any fixed position, and also to permit a quick disengagement of the bushing if it is desired to remove it from the work.

In the present invention, the above objects are attained by providing a novel form of handle which interlocks with the bushing and is held in engagement by a removable snap spring removably seated near one end of the bushing.

Referring now more particularly to the drawing, a bushing S is designed and intended to receive drills, reamers, and other mechanical devices for accurately positioning them with respect to a support or the work for which it is intended. As represented in Fig. 2, a work support 'I has a sleeve 8 in which the jig bushing is inserted.

Near one end of the bushing is an outwardly projecting shoulder 9 which limits the insertion of the bushing into the sleeve 8 with a notch iii extending through the projecting portion of the shoulder. Beyond the shoulder the bushing is formed with a neck Il around which may be fitted the apertured end l2 of a handle i3 adapted to rest against the shoulder thereof.

Around the bushing neck is formed a groove I4 adapted to receive a split locking spring l5 which is snapped in place over the end of the bushing. The thickness of the spring ring may be slightly less than the arcuate width of the groove I 4 whereby it is free to lie slightly to one side thereof and bear downwardly upon the upper face of the apertured end or perforated portion l2 of the handle to hold the latter tightly in position against the shoulder 9.

The handle which is preferably made of metal, is formed with a lip i6 turned downwardly from the apertured end to engage in the notch I0 of the bushing shoulder, thereby providing an interengaging lock for holding the handle and the bushing against relative rotation. The handle is preferably formed with an offset connecting the outer hand hold portion i1 and its apertured end I2, the offset portion comprising opposite angular bends I3 and I9 in the angular portions of which are indentations 2Q to form the opposite strengthening ribs 2 I. In the outer hand hold portion, a small perforation 22 may also be provided for hanging the bushing upon a suitable support.

At one end of the snap ring is a hook or projection 23 which extends outwardly from the end of the bushing to provide means for receiving engagement from a tool to facilitate removal of the ring from the bushing when it is desired to disengage the handle therefrom.

In order to tightly hold the bushing in any xed position, a lock screw 24 may be provided having a lower threaded portion 25 adapted to be inserted in a threaded hole in the support outside of the sleeve 8, the screw being formed with an unthreaded portion 26 adjacent an enlarged head 2l so that the head will engage over the edge of the apertured end I2 of the handle. By threading the screw inwardly, it will hold the bushing tightly in place. In order to make the bushing easily removable from the work support without entirely removing the holding screw 24, the edge of the apertured end l2 of the handle is provided with a curved notch 28 through which the enlarged head 27 of the screw' is free to pass after thebushing and its handle have been rotated to the point where the one is in register with the other.

With this construction, the bushing may be easily raised, lowered, rotated, engaged, or disgaged with respect to the handle, and held in place by locking means which engages the handle. The handle itself is both light and strong, and it is olTset with respect to its attachment to the bushing so that the bushing may be readily applied, removed and operated without the hand of an operator or the handle itself being any obstruction to the bushing.

While a preferred construction is thus particularly described, various changes in the structure, combination and arrangement of parts may be made without departing from the spirit and scope of the invention.

I claim:

l. A jig bushing in combination with a handle and means for resiliently securing the bushing to the handle, said means comprising an outer shoulder near the top of the bushing, the handle having an opening for seating it against the shoulder, the bushing having a groove of arcuate cross section adjacent the top and above the handle when seated against the shoulder, and a spring ring having a thickness less than the arcuate width of the groove seated therein and bearing against the top of the handle.

2. The combination with a jig bushing having an outer shoulder adjacent one end and a rounded groove nearer the end, of a handle having an opening to iit over the end of the bushing and against the shoulder, and a spring holding ring engageable in the groove, the ring having a thickness less than the width of the groove to press yieldingly against the top of the handle,

3. In combination, a bushing having an outer shoulder adjacent one end and a rounded groove between the shoulder and the end of the bushing, a handle having a portion with an opening to t over the end of the bushing and against the shoulder` and a split spring holding ring seated in the groove to engage the said handle portion and having o-ne end of the ring projecting from the bushing for engagement of a tool therewith.

4, The combination with a bushing having an outer shoulder adjacent one end with an outer groove nearer the end and a slot through the shoulder, of a handle therefor having an opening to fit over the end of the bushing against the shoulder and a lip engaging in the shoulder slot, and a spring ring seated in the groove and engaging the outer face of the handle adjacent the opening.

5. A jig bushing having an outer shoulder adjacent one end, a handle having a perforated portion to fit over the end of the bushing against the shoulder and a hand hold portion offset from the perforated portion, means at the outer end of the bushing to resiliently engage the perforated portion of the handle, and engaging means to 4 lock the handle and bushing together against relative rotation.

6. A jig bushing having an outer shoulder adjacent one end forming a work positioning support, an offset handle therefor having a perforated portion to engage over the end against the outer side of the shoulder and a hand hold portion connected to the perforated portion by angular bends having indented edges forming opposite strengthening ribs, and means for securing the perforated portion of the handle against the shoulder.

7. The combination with a jig bushing and a support to which it is applied, of a shoulder near the end of the vbushing to limit its insertion into said support, and a handle having a perforated portion inserted over the end of the bushing against the outer side of the shoulder, an outer hand hold portion oiset from the perforated portion to space it from the support, means to reinforce the handle portions in the offset, yielding means for holding the handle on the end of bushing against the shoulder, and interengaging means on the shoudler and handle to prevent their relative rotation.

8. The combination with a jig bushing and a support to which it is applied, of a shoulder near the end of the bushing to limit its insertion into said support, and a handle having a perforated portion inserted over the end of the bushing against the outer side of the shoulder, an outer hand hold portion oiset from the perforated portion to space it from the support, means to reinforce the handle portions in the olset, yielding means for holding the handle on the end of bushing against the shoulder, and means to lock the bushing in the support comprising a headed lock screw insertable in the support with its head to engage over the outer edge of the handle portion, and the outer edge of the handle portion having a rounded notch through which the head of the screw will pass when it registers with the notch.

9. A bushing having an outer shoulder near one end, an olset handle having a perforated portion to fit over the end against the shoulder, means for locking the handle against rotation with respect to the bushing, resilient means for retaining the handle in locking position, and the outer edge of the perforated portion having a notch through which the head of a work locking screw will pass when the bushing and handle are rotated to register therewith.

10. The combination wth a jig bushing and a support to which it is applied, of a shoulder near the end of the bushing to limit its insertion into said support, and a handle having a perforated portion inserted over the end of the bushing against the outer side of the shoulder, an outer hand hold portion offset from the perforated portion to space it from the support, means to reinforce the handle portions in the offset, yielding means for holding the handle on the end of bushing against the shoulder, a headed locking screw inserted in the support at the side of the bushing to engage over the edge of the perforated handle portion for holding the bushing in place, and the handle portion having a notch in its outer edge through which the head of the screw will pass when they are rotated by the handle to register with each other to remove the bushing without removing the screw.

JAMES E. ANTONIDIS. 

